| Cladonia didyma (Fée) Vain. Acta Soc. Fauna Fl. Fenn. 4: 137. 3-31 Dec 1887. |
| |  Scyphophorus didymus Fée Essai Crypt. Écorc. cxviii, ci. 29 Jan 1825. 'Santo Domingo' [Dominican Republic], D. Poiteau s.n. |
| | | Lectotype G, Isolectotype G, PC-Montagne, UPS |
| | | : Ahti, T. 1993. Names in current use in the Cladoniaceae (Lichen-forming Ascomycetes) in the ranks of genus to variety. In: Greuter, W. ( ed.). Regnum Veg. 28: 58-106. |
| | = Cladonia didyma var. vulcanica (Zoll. & Moritzi) Vain. Acta Soc. Fauna Fl. Fenn. 4: 145. 3-31 Dec 1887. |
| | = Cladonia vulcanica Zoll. & Moritzi Natuur- Geneesk. Arch. Ned.-Indië 1: 396. 1844. Indonesia, Java, Banjoewangie, H. Zollinger 87. |
| | | Lectotype L |
| | | : Stenroos, S. 1986. The family Cladoniaceae in Melanesia. 2. Cladonia sect. Cocciferae. Ann. Bot. Fenn. 23: 239-250. |
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